Shattered

Tom Ryan

Abby Randall

Neil Randall

Sophie Randall

Judy Ryan

Helen Schriver

Jerry Crane

Karl Granger

Diane

Dave Carver

Det. McGill

Matt Ryan

Female Teller

French Waiter

Maitre D'

Rude Man

Business Man

Bank Police Officer (as O.L. Bramble)

Suzanne At Bank

Antiques Proprietor

Hotel Maid

Front Desk Officer

Foreign Taxi Driver

Ad Exec.

Pedestrian

Pedestrian

Clerk (uncredited)

Pedestrian

Business Professional (uncredited)

Pedestrian

Business Person (uncredited)

Chicago Businessman Tipping Drummer (uncredited)

Commuter (uncredited)

Passenger (uncredited)

The title is taken from the phrase "Who breaks a butterfly upon a wheel?", meaning taking massive effort in achieving something minor. (See: "using a sledgehammer to crack a nut".)

When Neil opens the poetry volume, you can see the lines 304 to 310 of Alexander Pope's "Epistle to Dr Arbuthnot": But all such babbling blockheads in his stead Let Sporus tremble - A. "What? that thing of silk, Sporus, that mere white curd of ass's milk? Satire or sense, alas! can Sporus feel? Who breaks a butterfly upon a wheel?" P. Yet let me flap this bug with gilded wings, This painted child of dirt that stinks and stings, On top of the page there is merely a title "Satires", because the 'Epistle to Dr Arbuthnot' is also known as 'Prologue to the Satires'. Notice that in the final scene, Abby seems to continue Pope's rhyme by saying: Who breaks a butterfly on a wheel? I do, Neil ...

Pierce Brosnan actually crashed the car in the parking lot and their reactions after the crash were real.

When Neil runs to the clock tower he's all sweaty - his shirt is all wet, then in the elevator he's neat and clean, then on the roof he's wet again.

During the epilogue, Abby's hair alternates from being tucked behind her ear to simply hanging in her face.

At time marker 10 minutes, Abby and Randall are having dinner with champagne. While the camera is at Abby's back her glass is 1/2 full, the camera then cuts to Randall's back, and her glass is now only 1/4 full... She takes a sip at this point and upon placing her glass back down the camera angle changes again and her glass is now magically 3/4 full. Once again the camera angle changes again immediately after, and her glass is back to being 1/4 full.